前言为了规范MSC的学术命名,2006年,国际细胞治疗协会(ISCT)间充质和组织干细胞委员会(the Mesenchymal and Tissue Stem Cell Committee of the International Society for Cellular Therapy)推荐[1]。
We describe a case of a cutaneous perivascular myoma with features overlapping between the myofibromatosis and the myo pericytoma type. The patient is a 58 year-old woman with a painless plaque-like and multinodular...We describe a case of a cutaneous perivascular myoma with features overlapping between the myofibromatosis and the myo pericytoma type. The patient is a 58 year-old woman with a painless plaque-like and multinodular lesion in the pretibial dermis and subcutaneous tissue. She had repeated trauma to this site, first in her early youth that left an area of hyperpigmentation, and then again at age 40. The biopsy showed a biphasic pattern with a myofibromatosis-type component composed of spindle cell myoid nodules and more cellular round cell areas. The myopericytoma-like areas appeared to be infiltrating along vessels. These areas contained aggregates of immatureappearing cells arranged concentrically around vascular lumina in a manner reminiscent of pericytes. Immunohistochemical stains showed focal positivity for smooth muscle actin. Immunohistochemical and ultrastructural studies have showed these pericyte-like cells to be of a myoid origin. The reason for the neoplastic proliferation of perivascular myoid cells is presently unknown. The association of trauma and neoplastic transformation of the skin is rare. We report the first case of a cutaneous perivascular myoma arising in a chronic scar.展开更多
文摘前言为了规范MSC的学术命名,2006年,国际细胞治疗协会(ISCT)间充质和组织干细胞委员会(the Mesenchymal and Tissue Stem Cell Committee of the International Society for Cellular Therapy)推荐[1]。
文摘We describe a case of a cutaneous perivascular myoma with features overlapping between the myofibromatosis and the myo pericytoma type. The patient is a 58 year-old woman with a painless plaque-like and multinodular lesion in the pretibial dermis and subcutaneous tissue. She had repeated trauma to this site, first in her early youth that left an area of hyperpigmentation, and then again at age 40. The biopsy showed a biphasic pattern with a myofibromatosis-type component composed of spindle cell myoid nodules and more cellular round cell areas. The myopericytoma-like areas appeared to be infiltrating along vessels. These areas contained aggregates of immatureappearing cells arranged concentrically around vascular lumina in a manner reminiscent of pericytes. Immunohistochemical stains showed focal positivity for smooth muscle actin. Immunohistochemical and ultrastructural studies have showed these pericyte-like cells to be of a myoid origin. The reason for the neoplastic proliferation of perivascular myoid cells is presently unknown. The association of trauma and neoplastic transformation of the skin is rare. We report the first case of a cutaneous perivascular myoma arising in a chronic scar.
